Generate TypeScript from JSON
Generate TypeScript types from JSON locally in the browser.
TypeScript interfaces will appear here...
Generate TypeScript Interfaces from JSON
Paste a JSON sample and turn it into TypeScript interfaces and type definitions without writing them by hand. It is useful for API payloads, prototypes, and quick frontend scaffolding.
Benefits: Instant generation, handles nested objects and arrays, supports optional fields, works offline.
Best for: REST responses, frontend types, rapid prototyping, and replacing manual type writing.
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Need a different route? Check the next tool in this cluster instead of starting over.
Browse Developer toolsQuestions before you use it
Does it handle nested objects and arrays?
Yes. The generator recursively processes nested objects and creates sub-interfaces. Arrays are typed as type[] or typed tuples.
Will it mark fields as optional?
Fields present in the JSON sample are typed as required. For optional fields, manually add ? after the property name in the output.
What TypeScript version does the output target?
The generated interfaces are compatible with TypeScript 4.0+ and follow standard interface syntax.